with inserts of green serpentin marble. In Lombardy and Emilia, in that age united, in Romanesque epoque there was a great artistic flowering. The most monumental churches and cathedrals are often built with the campata system, with varying columns which weigh a tutto sesto arcos. In plain the material of construction is prevalently the mattone, but buildings in stone do not lack. The greater part of the Roman cities along the via Emilia is equipped in this age of monumental cathedral, between which they already maintain to the medieval system. Abruzzo San Clemente a Casauria San Liberatore a Maiella Santa Maria Arabona Sant'Antimo Abbey Aosta Valley Aosta Cathedral Collegiate church of Saint Ursus Emilia-Romagna Modena Cathedral - Abbey of San Mercuriale, Forlì and campanile - Chiesa di S. Maria Oliveto (Albinea - province of Reggio Emilia) Parma Baptistery - Parma Cathedral - Piacenza Cathedral - Friuli-Venezia Giulia Basilica di Poppo, Aquileia, province of Udine Basilica patriarcale, Aquileia - province of Udine Latium Cathedral of Acquapendente (province of Viterbo) Church of S. Maria della Libera (Aquino - province of Frosinone) Lombardy Sant'Ambrogio, Milan San Lorenzo, Milan Duomo vecchio, Brescia San Michele Maggiore, Pavia Cathedral of Monza S. Cosma e Damiano (Rezzago - province of Como) Madonna del Ghisallo (Magreglio - province of Como) S. Alessandro (Lasnigo - province of Como) S. Pietro (Albese - province of Como) Chiesa di S. Tommaso (Acquanegra sul Chiese - province of Mantova) Sant'Abbondio (Como) San Tomè (Almenno San Bartolomeo - province of Bergamo) Marche Ancona Cathedral (Ancona) Santa Maria della Piazza, Ancona (Ancona) Pieve of S. Urbano (Apiro - province of Macerata) San Vittore alle Chiuse Piedmont Vezzolano Abbey (Albugnano - province of Asti) Crypt of Sant'Anastasio (Asti) Pieve of San Secondo (Cortazzone - province of Asti) San Secondo (Magnano) Church of Saints Nazarius and Celsus (Montechiaro - province of Asti) Pieve of San Lorenzo (Montiglio - province of Asti) San Michele, Oleggio Abbey of Santi Nazario e Celso (San Nazzaro Sesia - province of Novara) Abbey of Santa Fede (Cavagnolo - province of Tourin) Cattedrale dell'Addolorata (Acqui Terme - province of Alessandria) Church of S. Pietro (Albugnano - province of Asti) Baptistery of Agrate (Agrate Conturbia - province of Novara) Romanesque architecture in Canavese area Ivrea - Puglia Basilica of San Nicola, Bari Bari Cathedral Ruvo Cathedral Otranto Cathedral Barletta Cathedral Andria Cathedral Church of Saint Conrad, Molfetta Altamura Cathedral Basilica of Santa Maria